(单选题)

52.（）

A.research

B.talk

C.cry

D.watch

参考答案：A

参考解析：

考查上下文语境和名词辨析。句意：经过无数小时的研究，他们发现了一种解决方案。他们发现了一种食用油，似乎可以防止ALD损害大脑。research意为“研究”；talk意为“交谈”；cry意为“哭”，watch意为“观察”。根据下文they discovered a kind of solution可知，他们应该做了很多研究。故选A。

知识点：有选项完形填空英语专业基础知识完形填空教师招聘-小学英语

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52.（ ）

52.（）